121102021101 has 16 divisors (see below), whose sum is σ = 162784387584. Its totient is φ = 80079240624.

The previous prime is 121102021097. The next prime is 121102021123. The reversal of 121102021101 is 101120201121.

It is not a de Polignac number, because 121102021101 - 2² = 121102021097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102041101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24835 + ... + 492768.

It is an arithmetic number, because the mean of its divisors is an integer number (10174024224).

Almost surely, 2^121102021101 is an apocalyptic number.

It is an amenable number.

121102021101 is a deficient number, since it is larger than the sum of its proper divisors (41682366483).

121102021101 is a wasteful number, since it uses less digits than its factorization.

121102021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518240.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121102021101 its reverse (101120201121), we get a palindrome (222222222222).

The spelling of 121102021101 in words is "one hundred twenty-one billion, one hundred two million, twenty-one thousand, one hundred one".